{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93266", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-17T16:02:15.097Z", "datePublished": "2026-09-24T15:52:05.559Z", "dateUpdated": "2026-09-24T15:52:05.559Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-24T15:52:05.559Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: RSI: fix field-spanning write warning in attestation token init\n\nThe challenge is passed in registers a1 through a8. However, copying to\n&regs.a1 makes FORTIFY treat the destination as the single a1 field,\nresulting in a field-spanning write warning. [1]\n\nOverlay the SMCCC register structure with an RSI-specific argument\nlayout and copy the challenge into an explicit 64-byte array. This keeps\nthe existing a1-a8 argument encoding while giving the copy a correctly\nsized destination object.\n\n[1]\nmemcpy: detected field-spanning write (size 64) of single field \"&regs.a1\" at ./arch/arm64/include/asm/rsi_cmds.h:119 (size 8)\nWARNING: ./arch/arm64/include/asm/rsi_cmds.h:119 at rsi_attestation_token_init+0xdc/0xf8 [arm_cca_guest], CPU#0: cat/3314"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/include/asm/rsi_cmds.h"], "versions": [{"version": "b880a80011f56880f32bde47fc6af313359f926b", "lessThan": "e505092cb200d430d5b8d8d3e926d45f29474ba3", "status": "affected", "versionType": "git"}, {"version": "b880a80011f56880f32bde47fc6af313359f926b", "lessThan": "d29a8ee271da17b5e32d7a76a9c78d43f66447ca", "status": "affected", "versionType": "git"}, {"version": "b880a80011f56880f32bde47fc6af313359f926b", "lessThan": "221049874b6a78c7d87bc826581b0695cd338e2b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/include/asm/rsi_cmds.h"], "versions": [{"version": "6.13", "status": "affected"}, {"version": "0", "lessThan": "6.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.13", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e505092cb200d430d5b8d8d3e926d45f29474ba3"}, {"url": "https://git.kernel.org/stable/c/d29a8ee271da17b5e32d7a76a9c78d43f66447ca"}, {"url": "https://git.kernel.org/stable/c/221049874b6a78c7d87bc826581b0695cd338e2b"}], "title": "arm64: RSI: fix field-spanning write warning in attestation token init", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/arm64/include/asm/rsi_cmds.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "e505092cb200d430d5b8d8d3e926d45f29474ba3", "status": "affected", "version": "b880a80011f56880f32bde47fc6af313359f926b", "versionType": "git"}, {"lessThan": "d29a8ee271da17b5e32d7a76a9c78d43f66447ca", "status": "affected", "version": "b880a80011f56880f32bde47fc6af313359f926b", "versionType": "git"}, {"lessThan": "221049874b6a78c7d87bc826581b0695cd338e2b", "status": "affected", "version": "b880a80011f56880f32bde47fc6af313359f926b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/arm64/include/asm/rsi_cmds.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.13"}, {"lessThan": "6.13", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: RSI: fix field-spanning write warning in attestation token init\n\nThe challenge is passed in registers a1 through a8. However, copying to\n&regs.a1 makes FORTIFY treat the destination as the single a1 field,\nresulting in a field-spanning write warning. [1]\n\nOverlay the SMCCC register structure with an RSI-specific argument\nlayout and copy the challenge into an explicit 64-byte array. This keeps\nthe existing a1-a8 argument encoding while giving the copy a correctly\nsized destination object.\n\n[1]\nmemcpy: detected field-spanning write (size 64) of single field \"&regs.a1\" at ./arch/arm64/include/asm/rsi_cmds.h:119 (size 8)\nWARNING: ./arch/arm64/include/asm/rsi_cmds.h:119 at rsi_attestation_token_init+0xdc/0xf8 [arm_cca_guest], CPU#0: cat/3314"}], "id": "CVE-2026-93266", "lastModified": "2026-09-24T16:17:23.453", "metrics": {}, "published": "2026-09-24T16:17:23.453", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/221049874b6a78c7d87bc826581b0695cd338e2b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d29a8ee271da17b5e32d7a76a9c78d43f66447ca"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e505092cb200d430d5b8d8d3e926d45f29474ba3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}